MWLTP引发聚合poly（NIPA/AMPS）交联水凝胶及其在T/C织物上的应用

【作者】 崔桂新；

【导师】 马晓光；

【作者基本信息】 天津工业大学 ， 纺织化学与染整工程， 2005， 硕士

【摘要】 本文以N—异丙基丙烯酰胺(NIPA)、2—丙烯酰胺—2—甲基丙磺酸(AMPS)为主要原料,N,N’—亚甲基双丙烯酰胺(Bis)为交联剂,采用MWLTP(微波低温等离子体)引发聚合法合成了具有较好弹性和透明性的聚合物水凝胶体系:N—异丙基丙烯酰胺与2—丙烯酰胺—2—甲基丙磺酸交联聚合水凝胶体系(poly[NIPA/AMPS])。与单一聚N—异丙基丙烯酰胺水凝胶不同,引入2—丙烯酰胺—2—甲基丙磺酸后得到的新型水凝胶不仅具有温度敏感性而且具有较好的溶胀性能和pH敏感性。研究了总单体浓度、AMPS单体浓度、交联剂浓度、微波低温等离子体处理功率、处理时间及聚合温度等因素对生成的水凝胶溶胀性能及温度敏感性的影响,讨论了AMPS单体浓度不同时水凝胶体系的pH敏感性,并对水凝胶溶胀/收缩动力学作出了分析。 采用红外光谱、紫外谱图等分析手段考察了聚合物体系的结构,通过考察水凝胶的溶胀比(SR),发现聚合物水凝胶在适当的工艺条件下有敏锐的温度和pH敏感行为,并具有很好的可逆性,交联剂对水凝胶的溶胀比影响最大,交联剂浓度越大,水凝胶的溶胀比越小,而决定低临界溶解温度(LCST)的是AMPS单体的浓度,随AMPS的含量的增加而增加。 在聚合交联水凝胶研究的基础上,以T/C织物为基体,采用Ar微波低温等离子体引发接枝了(N—异丙基丙烯酰胺/2—丙烯酰胺—2—甲基丙磺酸钠),探讨了总单体浓度、AMPS单体浓度、交联剂浓度、Ar微波低温等离子体处理功率、处理时间、气体压力及接枝聚合温度等因素对增重率的影响,并用红外谱图对接枝样品进行了表征。在接枝实验中,尝试用正交实验法对增重率进行优化,进而选取接枝聚合的最佳工艺条件。通过测定接枝T/C织物的溶胀性能,表明接枝了二元(N—异丙基丙烯酰胺/2—丙烯酰胺—2—甲基丙磺酸钠)的T/C同二元交联聚合体系相似具有温度敏感性,着重讨论了在AMPS单体浓度不同时接枝T/C样品表现出的pH敏感性。比较织物接枝前后的静水压、透湿性和顶破强力,结果表明,接枝后织物的静水压有很大程度的提高,接枝二元(N—异丙基丙烯酰胺/2—丙烯酰胺—2—甲基丙磺酸钠)的T/C织物的静水压由0变为127.42Kpa。接枝后的T/C织物透湿性和顶破强力都有所降低。更多还原

【Abstract】 In this paper, a kind of novel polymeric hydrogel with good elasticity called poly[N -isopropylacrylamide/2-acrylamido-2-methylpropanesulfonic-acid](poly(NIPA/AMPS)) was synthesized from N - isopropylacrylamide (NIPA) and 2 - acrylamid - 2 -methylpropanesulfonic-acid (AMPS) through microwave low-temperature plasma initiation polymerization technique, in which N,N’ - methylene bis(acryl - amide) (Bis) as the crosslinking agent. Different from individual poly N-isopropylacrylamide (PNIPA) hydrogel, the polymeric hydrogel is characteristic of not only temperature sensitivity but also preferable swelling properties and pH sensitivity. Effects of monomer concentrations, monomer mol ratios, crosslinking agent concentrations, plasma treatment powers, treatment durations and polymeric temperature on gel swelling properties, temperature and pH sensitivity were investigated. The optimal process of initiating polymerization on (poly(NIPA/AMPS)) hydrogel with microwave low-temperature plasma was determined.The structure of the synthesized polymers was confirmed by infrared spectroscopy (IR) and ultra spectroscopy. By examining the swelling ratio of hydyogels, it is obviously that the hydrogels of (poly(NIPA/AMPS)) obtained in appropriate conditions have acute sensitivity thermo-responsive and pH characters, moreover, good reversibility. The result shows that cross linker concentration has greater effect on swelling ratio (SR), and the lower critical solution temperature (LCST) of polymer were decided by the concentration of AMPS monomer.Based on the research on gel of polymerization, (N-isopropylacrylamide / sodium 2-acrylamide-2-methylpropanesulfonate (NIPA/SAMPS) was grafted onto T/C fabrics by Ar microwave low-temperature plasma induced grafting polymerization technique. Effects of monomer concentrations, AMPS monomer concentrations, crosslinking agent concentrations, plasma treatment powers, treatment durations, gas pressures, polymeric temperature on weighting percentage were discussed. Orthogonal method was used to optimize the process of grafting with good weighting percentage. Results indicate the surfaces of T/C fabrics grafted with (NIPA/SAMPS) showed both temperature and pH sensitivity. In comparison with untreated samples, the hydrostatic pressure of grafted samples improved vastly and the water vapour transmittion rate and the puncture resistance of that decreased slightly.更多还原